inaudibly's Usage Examples:

Natasha jumped on it, sank into the feather bed, rolled over to the wall, and began snuggling up the bedclothes as she settled down, raising her knees to her chin, kicking out and laughing almost inaudibly, now covering herself up head and all, and now peeping at her mother.

She was nursing her boy when the sound of Pierre's sleigh was heard at the front door, and the old nurse--knowing how to please her mistress-- entered the room inaudibly but hurriedly and with a beaming face.

Would you like to kiss me? she whispered almost inaudibly, glancing up at him from under her brows, smiling, and almost crying from excitement.